Stop mechanism.



A. M. SOSA & W. P. WINTERS.

STOP MECHANISM.

APPLICATION FILED MAY 10. 1917.

Patented Oct. 1, 1918.

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ms Noun FEYERS ca.. Momumm. WASHINGTON. 11 L.

AUGUST M. sosannn-wrmialvr RwmrrERs, or oIivcInNATI, or Io,AssIGnonsrofirIIE AMERICAN TOOLJWOBKS COMPANY, oromcrmmrr, OHIO, Aoonronn'rron or I wnsrvIRGINIA.

To all whom it may concern;- 1 Be it known that we, AUGUST M. SosA andWILLIAM P. WINTERS, citizens of theUnit'ed States, residing in'Cincinnati,'. Hamilton county, Ohio, have'invented certain new anduseful Improvements in Stop Mechanisms,

' of which the following is a specification.

- Our invention relates to engine lathes other machine tools, and hasfor its prlme object to provide for automatically d1scon- 'tinuing theoperation of the cutting toolat predeterminedpointsin its feeding move-The invention is emb'odiedin the form of stop mechanism which iscapable. of being set or adjusted tobringabout-eitheraselectivestoppi-ng or a successive stopping. of theoperationiof the cutting tool. This object is accomplished by an initialsetting'of one ormore'stopswhich cooperate with dogs adjusted atpredetermined intervals, and which stops requireno further adjustmentaftertheir original setting, it'being merely suflicient to withdraw thatstop which has operated to disconnect the driving mechanism in orderthat the machine may resume its operation until stopped byjanother stopin accordance withthe setting of the stops.

An embodiment of the invention. has been shown inthe accompanyingdrawings, wherein:-;@ q Figure lis a frontelevation ofanengine I lathewith portions removed and embodying -our improvements;;Fig. v2, a frontelevation with portions broken away and-portions in section showing anassemblage of the automatic stop mechanism for the feed rod; Fig.

3, an end elevation with portions insection on the broken line aa ofFig. 2; Fig.4," a plan with: portions broken away and p01 tions insection of the shifting rod showing the dogs and. certain correspondingstops in operative position; Fig. 5, a front elevation with portionsbroken awayand portions removed showing the shifting rod provided withdogsof modified formof construction and with a shifting arm for the feedrod; Fig. 6,a transverse section on the line 6- of Fig. 5;; and Fig. 7 aplan of the dogs shown in Fig. 6. f 5 I In thedrawings 1 re resentsthebed of an engine lathe with the I lead and teil'stocks .sro riivrncHAnIsMQ removed 2 portions of the-supportinglegs; 3 the toolcarriage provided'with the cross slide 4: and' the depending -apron'5; 6the lead screw journaled in the bearing 7 and provided with the clutchmember 58; 9 a sleeve loose on the lead screw within the speed box 11and driven from the gear 12 member 16; 17 a shifter for gear 14 formoving it longitudinally with said clutch member into engagementwith'the coacting member 8, as shown in Fig. 5, for actuatingSpecification of Letters Patent Patented 1918, I Applicatipnfiledmayld,1917. Seria11 1" o.167,671.

the lead screw, alltbeing constructed and ar- I ranged in the ordinarymanner. 7 The sleeve 18 ournaled in the bearing 7 is provided with thegear 20 in continuous en .gagement Withv the driven gear 14' and formedwith theFclutch member 21 and with mentwith the groove '15. iSaid gearand sleeve are movablelongitudinally in unison with the shifting ofthe'gean 14 on sleeve 118'. I The feed rod 23, journaled in the sleeve18 and the bearing 24, is provid ed with the the annular shiftingcollar22 in'engage- 4 collar 26 in contact .withthebearing 2e and withthe clutch 1nember-thereon in engagement with the coactingclutch'member-:21 as shown in Fig. 2 for actuatingsaid rod to impart thefeeding movement in the usual man ner to the carriage through theordinary apron gear connections, not shown. .The shifting rod31.journaled in bearings 32 and 33 is provided with a series of dogs 34which may be i selectively and. independently secure'dinpredetermined'longitudi nal positions of adjustment thereon by means ofthegclamping screws Said dogs project laterally to form steps86, eachhaving an inclined. wall 37 as shown in Fig.

apron istprovided with a "series of mov able stopsor. pull pins 39infixed distance relations-and adaptedfto be .carried therebyinto'successive engagementwith thecor- The, depending extension 38 ofthe responding inclined .walls *3? ier 5 rocking the shifting rod 31together with the cam collar 41 thereon in an outward direction againstthe exertion of thespring 4:2. The yoke lever 43, fulcrumed in thebracket 44, engages at one end with the collar 25 and is'pro-vided atthe other end with the antifriction roller 45 inengagement with the camcollar 41 whereby said lever is actuated to shift the feed rodlongitudinally against the exertion of the spring 28 for disengagingtheclutch member 27 thereon from the driven coacting member 21 anddiscontinuing the action of said rod and the carriage with the cuttingtool. The depending extension 3-8 .of the apron is .provided with aseries of openings 38, through which access may be had to the screws 3.5of such dogs as may be covered up by said .eX tension.

Inthe construction shown in Figs. ,5, .6 and 7 the rod 81 is movablelongitudinally instead of rjotatively and against the exertiQn of thespring 46 for actuatingthe arm 47 thereon to disengage the feed rod fromits driven connections. For this purpose the dogs 34 having inclinedwalls 37 are substituted by the dogs 48 having vertie cal walls 9 forthe abrupt contact therewith of the corresponding stops 39.

In operation, when the gear 14 is shifted to engage the clutchconnections with the lead screw, the gear 20 withthe sleeve 1:8 isthereby moved in the same direction. In this position .of the gears thecontact of the stop collar 26 against the bearing 24 limits the movementof the feed rod under the exertion of the spring '28 and prevents theengagement of the clutch member 27 thereon with the clutch member 21 asshown in Fig. 5. A shifting of said gears in the opposite direction andout of engagement with the lead screw permits the engagement of theclutch connections with the feed rod. In this manner the lead screw andfeed rod can be actuated only alternately.

After the blank to be turned is placed in the lathe in the usual manner,the carriage may be adjusted with the cutting tool in registration withthe intended location of the offset nearest the tail. stock, thecorresponding dog may then be adjusted on the shifting rod in engagementwith its coacting stop. p

The successive dogs and stops "may be adjustedin like manner with thetool in registration with the corresponding intended offsets. Thecarriage being actuated by the feed rod in the usual manner carries thecorresponding stop into engagement with the step on the first dog andactuates the shifting rod to move the feed rod longitudinally out ofengagement with its driving gear and discontinue the cuttingaction ofthe tool as it registers with the first ollset on the spindle. Theoperator then disengages the stop from the dog, the exertion of spring28 automatically reengages the feed shaftcwi-th its gear. The succeedingstops may be in like manner automatically engaged with and successivelydisengaged from the dogs with the cutting tool in registration with thecorrespond-ing offsets in the spindle.

, Having fully describedou-r improvements, what we claim as ourinvention and desire to S cure by Letters Patent of the United Statesis:i

1. automatic stop mechanism, for machine tools, including a plurality ofdogs for actuating the stop mechanism, and .a plurality of stopsmanually settable for selective actuation of the .dogs.

2. .An automatic stop mechanism, for machine tools, including a shiftrod, a plurality of dogs adjustable upon the shift rod, and a stopdevice to be carried by the tool carriage of the machine and providedwith a plurality of stops set-table for selective actuation of the.dogs. j

3. An automatic stop mechanism, for machine tools, including a pluralityof dogs for actuating the stop mcchanismand a plurality of stopsmanually settable for selective and successive actuation of the dogs.

4;. An automatic mechanisin,'for machine tools, including a shift rod, aplurality of dogs adjustable upon the shift rod and a stop devicelto becarried by the toolcarriage of the machine and provided with a pluralityof stops settable for selective and successive actuation of .the dogs. I

5. An automatic stop mechanism for machine .tools, including a shiftrod, a plurality of dogs adjustable upon the shift rod, and a stopdevice to be carried by a tool carriage and carrying a plurality ofstops in the form of push pins capable of being set for codperation withtheir respective dogs.

.6. An automatic stop mechanism, formachine tools, including a shiftrod, a plurality of dogs adjustable upon the shift rod, and a stopdevice including a body to be carried by a tool carriage and carrying aplurality of stops in the form of push pins, each push means ingluding aplurality of stops settable 5 for coiiperation'wi-th respective do 5.

9. The combination with a mac iine tool.

plurality of dogs adjustable upon the shift having a traveling carriage,of automatic Wise into positions for cooperation with the stop mechanismlncluding a shift rod, a respective dogs.

A. M. SOSA.

1'0d,and a stop device including a body car- WM P WINTERS- ried by thecarriage and traveling in parallelism with the shift rod, and aplurality Witnesses: y of stops in the form of push pins carried byVILLARD R. JONES, said body and capabl of being adjusted end- 1 G.WALDVOGEL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of latents, Washington,'D. C.

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